Hi, I face problems while trying to process videos with Video2X Qt6 6.4.0

Describe the bug
The program fails to process video files, returning an error message: "Video processing finished with errors. See logs for more information.

To Reproduce
Steps to reproduce the behavior:

1. Open Video2X Qt6 6.4.0.
2. Add a video file for processing ( anyvideo.mp4).
3. Select the Real-ESRGAN processor and start the task.
4. Observe the task failure with an error message.

Expected behavior
The video file should process successfully without errors, and the upscaled output file should be generated.

Actual behavior
The task fails with the following error in the logs:
[2025-06-13 11:36:03] [info] Initializing Video2X Qt6 6.4.0 [2025-06-13 11:36:03] [info] Checking for available updates... [2025-06-13 11:36:04] [info] No upgrades available. [2025-06-13 11:36:32] [warning] File 'E:/Montage/Nouveau dossier/S01E01 - Mermaid Forest- Une sirène ne sourit jamais(VOST).realesrgan.mkv' already exists, finding a new name [2025-06-13 11:36:32] [warning] Writing output file to 'E:/Montage/Nouveau dossier/S01E01 - Mermaid Forest- Une sirène ne sourit jamais(VOST).realesrgan.1.mkv' [2025-06-13 11:36:32] [info] [FFmpeg] [libx264 @ 00000234cb2fcac0] using SAR=1/1 [2025-06-13 11:36:32] [info] [FFmpeg] [libx264 @ 00000234cb2fcac0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512 [2025-06-13 11:36:32] [info] [FFmpeg] [libx264 @ 00000234cb2fcac0] profile High, level 5.0, 4:2:0, 8-bit [2025-06-13 11:36:32] [info] [FFmpeg] [libx264 @ 00000234cb2fcac0] 264 - core 164 r3192 c24e06c - H.264/MPEG-4 AVC codec - Copyleft 2003-2024 - http://www.videolan.org/x264.html - options: cabac=1 ref=5 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=8 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=2 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=24 lookahead_threads=4 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=crf mbtree=1 crf=20.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00 [2025-06-13 11:36:32] [error] [FFmpeg] [matroska @ 00000234ccbb0cc0] Subtitle codec 94213 is not supported. [2025-06-13 11:36:32] [error] Error writing output file header [2025-06-13 11:36:32] [critical] Failed to initialize encoder: Function not implemented

Environment:

• OS: Windows 10 24H2
• GPU: AMD 780m iGPU (AMD Ryzen 9 7940HS)
• Video2X Qt Version: 6.4.0